tr: fix graph/print character class mapping

[can1357]

uutils tr treats ASCII space as part of [:graph:] and excludes it from [:print:]. Reversing the expected behavior.

Reproduction Steps

printf 'a b\n' | tr -d '[:graph:]' | od -An -t x1
# Expected (GNU): 20 0a
# Actual (uutils): 0a

Impact

Scripts that rely on POSIX/GNU character-class semantics may produce incorrect output. Space handling differs for [:graph:] and [:print:], breaking compatibility with standard filtering behavior in data-cleaning and normalization pipelines.

[cakebaker]

Thanks!